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When coining the term Isomorphic JavaScript, Robbins explains that he meant “that any given line of code (with notable exceptions) can execute both on the client and the server”. However, if we examine more closely the meaning of the word isomorphic we read “corresponding or similar in form and relations”. In other words, two entities that are not the same but only look the same. This would be a great word to use when describing the relationship between jQuery and ZeptoorUnderscore and lodash, for example. These libraries are similar in form (they share the same API) but differ in underlying ideas and philosophy.
Instead, what we need is a word that describes the same code but running in a different environment. Nowadays we run JavaScript code not only on servers and in browsers, but on mobile and embedded devices as well. We’re running it on Raspberry Pis and Wii Us and iPhones. But this is a purely technical argument. What’s even more important is conveying understanding.
But of course, understanding is highly subjective. Recently, Ryan Florence and I began conducting React.js Training courses full-time. Up to this point we have trained several hundred developers, and it’s not uncommon for someone to ask what the word isomorphic means. Now, this is purely anecdotal evidence, but when we use the word universal instead of isomorphic everyone gets it. It may have something to do with Apple using that same word to describe application bundles that ran on both architectures back when they made the switch from PowerPC to Intel.
It’s true that there are two hard problems in computer science and one of them is naming things. Why? Because good names are important. A good name teaches about purpose and responsibility, so you have to spend some time thinking about it.
So let’s give our JavaScript code a name that people can understand; a name that indicates what it actually does instead of introducing words into the common vernacular that clearly don’t belong there; a name that teaches people that it runs not only on servers and browsers, but on native devices and embedded architectures as well.
Let’s call it Universal JavaScript.
My thanks to Ryan Florence, Pete Hunt, Peter Cooper, Dan Abramov, and Mark Dalgleish for reviewing this post prior to publication. Also, thanks to Ryan for riffing on these ideas with me.
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Sharad Agarwal
Madusanka Wattaladeniya
UMAPREETHI SANTHANAKRISHNAN
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